Liquid dentifrice

ABSTRACT

A liquid dentifrice which cleans, whitens and restores the natural lustre of teeth and dentures, and contains ingredients which adsorb stains, food particles and bacteria, preventing their adherence to the enamel surfaces of natural or artificial teeth. It is characterized by the fact that it is in the form of a homogeneous solution and remains so over long periods, and contains a humectant in desired amounts, enabling the dentifrice to retain moisture when exposed to air, thereby preventing the dentifrice from hardening when so exposed.

United States Patent Lauster [451 Aug. 8, 1972 LIQUID DENTIFRICE FOREIGNPATENTS OR APPLICATIONS [72] Inventor: Frederick L. Lauster, Massillon,1,559,196 1/1969 France ..424/49 Ohio Primary Examiner-Richard L. Hui?[73] Asslgnee Cameo Toledo Ohlo Artorney-Roylance, Abrams, Berdo & Kaul[22] Filed: Sept. 17, 1969 57 ABS CT [21] App1.No.: 858,854

A liquid dentlfrice whlch cleans, whitens and restores the naturallustre of teeth and dentures, and contains [52] U.S.C| ..424/57ingredients which adsorb stains, food particles and [SI] lnt.Cl. ..A6lk7/16 bacteria, preventing their adherence to the enamel [58] Field ofSearch ..424/49-58 surfaces of natural or artificial teeth. It is characterized by the fact that it is in the form of a 5 References Cit dhomogeneous solution and remains so over long periods, and contains ahumectant in desired amounts, UNITED STATES PATENTS enabling thedentifrice to retain moisture when exd to air, thereby preventing thedentifrice from 2,550,207 4/1951 Tamteretal. ..424/49 2,144,049 5/1956Salzmann et al ..424/49 hardemng when filmed 1 Claim, No Drawings 3,060,098 10/1962 Gershon ..424/52 1 LIQUID DENIIFRICE This inventionrelates generally to a liquid dentifrice which, when used regularly, ishighly effective for cleaning and polishing the teeth, withoutappreciable abrasion of the teeth.

A primary object of the invention is to provide a liquid dentifrice ofthe character described, which is characterized by the use of a cleaningagent which is highly adsorbent and is thus effective to gather on itssurface foreign material, debris and bacteria, which normally accumulateon and between the teeth, enabling such material to be easily removedduring cleaning of the teeth, leaving a glossy surface on the teeth.

Another object of the invention is to provide a liquid dentifrice of thecharacter described, which is characterized by the fact that it ishomogeneous or uniform in character, despite the fact that it consistsof a relatively large number of ingredients of diverse physicalcharacteristics and properties.

A further object of the invention is to provide a liquid dentifrice ofthe character described, which consists of a unique and highly efflcientor desirable combination of cleaning agent, polishing agent, humectant,

binder, and flavoring agent.

A still'further object of the invention is to provide a unique andhighly desirable method of mixing the aforesaid ingredients.

Other objects and advantages of the invention will appear in the courseof the following description of the liquid dentifrice and method ofcompounding or making the same.

The liquid dentifrice, in accordance with the invention, consists of thefollowing ingredients, in the proportion by weight indicated:

The aluminum hydroxide is a cleaning agent which has high adsorptionproperties, rendering it effective to gather on its surface foreignmaterial, debris, and bacteria, which normally accumulate on and betweenthe teeth, enabling such material to be easily removed during cleaningof the teeth, leaving a glossy surface on the teeth.

Dicalcium phosphate dihydrate is a polishing agent, which is effectiveto impart a desired lustre to the teeth, as the result of continued useof the dentifrice. Moreover, its action is such that it polishes theteeth without appreciable abrasion thereof.

Liquid sorbitol solution is a 70 percent aqueous solution of sorbitol,which is available as a trademarked product, called Sorbo." It acts as ahumectant, enabling the dentifrice to retain moisture when thedentifrice is exposed to air, thereby preventing the dentifrice fromhardening when so exposed.

Carboxymethylcellulose acts as a binder, to prevent separation of theliquid phase, particularly during $85 sill fin'ziiic fii 'gllfis eirlfifrfisfii'fiilli izes the mass against separation of the liquid phase.

The flavoring agent consists of one or more of the es sential oils,which impart an acceptable and pleasing flavor to the dentifrice whenused and leave a lasting pleasant after taste. These essential oils orflavors include menthol, oil of Wintergreen, oil of peppennint and oilof spearrnint.

The liquid dentifrice is compounded or made in the following manner:

The sorbitol and essential oils are heated until they are lukewarm,placed in a mixer bowl and agitated until they are thoroughly mixed. Tothis mixture are added the aluminum hydroxide powder, the dicalciumphosphate dihydrate powder, and carboxymethylcellu' lose, and mixing isresumed until a product of creamy consistency is obtained, after whichthe distilled water (previously heated to nearly boiling) is added, andagitation is resumed. The product is then strained to remove anypossible foreign matter, and the strained fluid poured into bottles andpermitted to cool.

This method of preparation ensures that the final product is entirelyhomogeneous or uniform in nature, prevents segregation of any of theconstituents, and results in a product of desirable consistency,suitable and thoroughly effective as a liquid dentifrice.

The dentifrice, as thus made, is highly effective in removing stainsfrom the teeth and restoring their original gleaming or pearlescentlustre, and retains its homogeneity for long periods, despite the factthat the constituents or ingredients have diverse physicalcharacteristics or properties.

It is understood that slight changes may be made in the formula andmethod, as described herein, without departing from the spirit of theinvention or the scope of the subjoined claims.

Having thus described my invention, I claim:

1. A method of making a liquid dentifrice consisting by weight of 25 to38 percent aluminum hydroxide, 7 to 13 percent dicalcium phosphatedihydrate, 25 to 38 percent of a percent aqueous solution of sorbitol,0.5 to L5 percent carboxyrnethylcellulose, l to 3 percent of essentialoils, and 15 to 35 percent water, wherein the sorbitol and essentialoils are heated until lukewarm, placed in a receptacle and agitateduntil thoroughly mixed, the aluminum hydroxide, dicalcium phosphatedihydrate and carboxymethylcellulose are added to the mixture, andmixing is resumed until a product of creamy consistency is obtained,after which the water, heated to nearly boiling, is added, and agitationis resumed.

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